ci: build builders: cuda-build:12.9.0, cuda-build:13.0.0

.github/actions/disk/action.yml

@@ -0,0 +1,15 @@
+---
+name: free disk space
+description: when rust compiling, free up some disk space
+
+runs:
+    using: composite
+    steps:
+        - name: free disk space
+          uses: jlumbroso/free-disk-space@54081f138730dfa15788a46383842cd2f914a1be # 1.3.1
+          with:
+              android: true
+              dotnet: false
+              haskell: false
+              large-packages: false
+              swap-storage: false

.github/workflows/cuda-builder.yml

@@ -0,0 +1,77 @@
+name: CUDA Builder
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - main
+    paths:
+      - Containerfile
+
+permissions:
+  contents: read
+  packages: write
+
+env:
+  IMAGE_NAME: ghcr.io/${{ github.repository_owner }}/cuda-builder
+
+jobs:
+  build-and-push:
+    name: cuda-builder:${{ matrix.cuda_tag }}
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        cuda_tag:
+          - 12.9.0
+          - 13.0.0
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - uses: ./.github/actions/disk
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Prepare Buildx cache
+        uses: actions/cache@v4
+        with:
+          path: /tmp/.buildx-cache
+          key: ${{ runner.os }}-buildx-cuda-builder-${{ matrix.cuda_tag }}-${{ github.sha }}
+          restore-keys: |
+            ${{ runner.os }}-buildx-cuda-builder-${{ matrix.cuda_tag }}-
+
+      - name: Log in to GHCR
+        if: github.event_name == 'push'
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and (conditionally) push cuda-builder image
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          file: Containerfile
+          build-args: |
+            CUDA_TAG=${{ matrix.cuda_tag }}
+          pull: true
+          push: ${{ github.event_name == 'push' }}
+          tags: |
+            ${{ env.IMAGE_NAME }}:${{ matrix.cuda_tag }}
+          labels: |
+            org.opencontainers.image.source=${{ github.repository }}
+            org.opencontainers.image.description=Pristine CUDA builder image (CUDA ${{ matrix.cuda_tag }})
+            org.opencontainers.image.licenses=Apache-2.0
+            org.opencontainers.image.title=cuda-builder
+            org.opencontainers.image.vendor=Quantus Network
+          cache-from: type=local,src=/tmp/.buildx-cache
+          cache-to: type=local,dest=/tmp/.buildx-cache-new,mode=max
+          provenance: false
+
+      - name: Move Buildx cache
+        run: |
+          rm -rf /tmp/.buildx-cache
+          mv /tmp/.buildx-cache-new /tmp/.buildx-cache

Containerfile

@@ -0,0 +1,37 @@
+# syntax=docker/dockerfile:1.7
+
+# Pristine CUDA builder image:
+# - Based on NVIDIA CUDA devel (Ubuntu 22.04)
+# - Installs toolchain and Rust
+# - No source copied, no build performed
+#   Use this image in CI to mount your workspace and build artifacts.
+
+ARG CUDA_TAG=12.9.0
+FROM nvcr.io/nvidia/cuda:${CUDA_TAG}-devel-ubuntu22.04
+ARG CUDA_TAG
+ENV CUDA_TAG=${CUDA_TAG}
+
+# System dependencies for building Rust/CUDA projects
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends \
+      curl ca-certificates pkg-config build-essential \
+      libssl-dev git clang cmake && \
+    rm -rf /var/lib/apt/lists/*
+
+# Install Rust (stable, minimal profile)
+ENV RUSTUP_HOME=/opt/rustup \
+    CARGO_HOME=/opt/cargo \
+    CUDA_HOME=/usr/local/cuda \
+    CARGO_TERM_COLOR=always \
+    PATH=/opt/cargo/bin:/usr/local/cuda/bin:${PATH}
+RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs \
+    | sh -s -- -y --profile minimal --default-toolchain stable && \
+    rustc --version && cargo --version
+
+# Working directory for consumers (CI jobs mount source here)
+WORKDIR /workspace
+
+# Notes:
+# - CI should use this image as a base and run cargo build inside the workspace.
+# - Optional environment knobs like CUDA_ARCH, MINER_CUDA_ALLOW_UNSUPPORTED_COMPILER,
+#   MINER_NVCC_CCBIN can be provided at runtime as needed.